id:A118722 - OEIS Search Results

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Chen primes for which the product of the digits is also a Chen prime.

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2, 3, 5, 7, 13, 17, 31, 71, 113, 131, 211, 311, 1117, 1151, 1511, 2111, 11117, 11171, 131111, 311111, 511111, 1111151, 1111211, 1111711, 1117111, 11111117, 11111171, 71111111 (list; graph; listen)

	OFFSET	`1,1`
	EXAMPLE	`31 is in the sequence because (1) it is a Chen prime and (2) the product of its digits 3*1=3 is also a Chen prime.`
	CROSSREFS	`Cf. A109611.` `Sequence in context: A118724 A046732 A046703 this_sequence A051026 A028865 A053435` `Adjacent sequences: A118719 A118720 A118721 this_sequence A118723 A118724 A118725`
	KEYWORD	`base,nonn`
	AUTHOR	`Luc Stevens (lms022(AT)yahoo.com), May 21 2006`

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Last modified July 23 17:35 EDT 2008. Contains 142285 sequences.

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